After WW2, special agents of the B.P.R.D. found a living, fishlike creature in a glass and wrought iron aquarium in an abandoned industrial site. Humanoid in shape, with gills and blue skin, it was dubbed "Abe" because of the brass plate riveted to the tank : April 14 1865 - the date Abraham Lincoln was shot. "Icthyo Sapiens", Abe is a highly intelligent, water dwelling Merman,with webby fingers, glowing eyes and strange, psychic powers. He is also Hellboy's friend, and quick witted, two fisted fighting partner.